It is always best to follow manufacturer’s suggestions for product care, but generally it is safe to clean an LCD screen using a very soft, 100% cotton cloth, and a mixture of distilled water and clear vinegar. If you prefer buying ready-made products, LCD cleaners are available from electronics shops in spray bottles.
While it might be tempting to use an old tee shirt for a cotton cloth, the seams can potentially scratch the screen. Flannel is the recommended material, and you can visit a fabric shop and buy a yard (0.9 meters) of 100% untreated cotton flannel for very little money. By purchasing this amount of fabric, you’ll be able to cut new cloths when the old one gets dirty. Microfiber cloth is also a good choice.
Distilled water is pure and therefore safe to use to clean an LCD screen. Do not use tap water, as the minerals can ruin the screen’s finish.
While many people use isopropyl alcohol in a 50/50 solution with distilled water, some manufacturers warn against this. If you are inclined to use isopropyl rather than vinegar, check with the manufacturer’s website of your LCD product to be sure this is acceptable. Many store-bought LCD cleaners contain isopropyl, and it is generally considered safe and effective.
Otherwise, a 50/50 solution of distilled water and white vinegar can be combined in a spray bottle. Avoid using a bottle that had previous cleaners or agents in it — a new spray bottle can be purchased at the grocery store. Choose a sprayer that is capable of a fine mist.
Cut a piece of cloth large enough to fold into a nice square pad that is a few layers thick. Spray your 50/50 solution on to the surface of the cloth, lightly dampening it. Be sure the cloth isn't so wet that it will drip down the screen. Do not spray the solution directly on to the LCD screen.
Before you clean an LCD screen, power it off to avoid potential damage. Take your cloth and gently wipe the surface from top to bottom, moving downward in a straight line. When you reach the bottom lift the cloth away and place it at the top again to proceed. Use a very light touch, as pressing against the screen could damage its pixels.
Do not move the cloth in a circular motion to rub out fingerprints or smudges. The solution will do the trick. If you have to cover an area twice, wait until its dry, then repeat the process. The vinegar should cut through any dirt or body oils deposited on the screen. By following this simple procedure, your screen should stay clear and unblemished.
Never use paper towels, napkins, or tissues to clean an LCD screen. These materials will either scratch the screen or leave debris. Household cleaners and ammonia should also be avoided, as they can leave a white cast, ruining the screen’s finish.